60-120 AD
Biographical Sketch: 

A neo-Pythagorean roman philosopher and mathematician, Nicomachus who wrote an Introduction to Arithmetic, an influential treatise on number theory. Considered a standard authority for 1,000 years, the book sets out the elementary theory and properties of numbers and contains the earliest-known Greek multiplication table.


Introduction to Arithmetic, Manual of Harmonics


Therefore if we crave for the goal that is worthy and fitting for man, namely, happiness of life--and this is accomplished by philosophy alone, and by nothing else, and philosophy, as I said, means for us to desire for wisdom, and wisdom the science of truth in things, and of things some are properly so called, others merely share the name--it is reasonable and most necessary, to distinguish and systemize the accidental qualities of things.